Pan motion belt apparatus for ore separation



F. P. STEWART `PAN MOTION BELT APPARATUS FOR ORE SEPARATION Filed Aug. 18, 1945 June 3, 1947.

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June 3, 1947. F. P. STEWART y PAN MOTION BELT APPARATUS FOR ORE SEPARATION Filed Aug. 18, 1943 5 Sheets-Sheet 2 Eme 3, 1947. y 5:-, STEWART 2,421,397

PAN MOTION BELT APPARATUS FOR ORE SEPARATION Filed Aug. 18, 1945 5 Sheets-Sheet 5 mank ,Slfewar June 3, 1947.l F. P. STEWART 2,421,397

PAN MOTION BELT APPARATUS FOR ORE SEPARATION Filed Aug. 18, 1943 5 Sheets-Sheet 4 IIIIII AMM? Sfewf June 3, 1947. F. P, STEWART 2,421,397

PAN MOTION BELT APPARATUS FOR ORE SEPARATION Filed Aug. 18. 1943 5 Sheets-Sheet 5 Patented June 3, 1947 PAN MOTION BELT APPARATUS FOR ORE SEPARATION Frank P. stewart, salt Lake city, Utah Application August 18, 1943, Serial No. 499,065

1 claim. (c1. zog-*433) My invention relates to ore reduction and has for its object to provide a new and highly eiiicient method of an apparatus for separating the heavier from the lighter materials in smelting andy refining plants where much iron and other heavy nes are lost even though they have been passed through various flotation cells to recover them This invention permits the passage of these materials directly onto an endless belt which is driven slowly in one direction with an incline at the end toward which the line valuable materials are carried. The material is fed in at the point of incline of the belt and all dross is discharged from lower waste end while all of the heavy values are elevated and fed over the top end of the belt by the rotation of the belt together with a rotary motion which is transmitted to the entire belt assembly so that the belt and all its operating parts together with all materials fed thereon are caused to be treated to a rotary motion or circular motion and any given point or particle oi material completes a circular motion around a given axis to compact or pack the fine heavy particle of 200 mesh or finer onto the belt so that they will be elevated and separated from the dross.

The circular motion causes the fine material to pack while the larger insolubles are rolled off over the top although in some cases the larger particles may be heavier than the nes.

The endless belt may be a solid one piece fabric or rubber belt of the type used for conveyors or may be made 'of a multiplicity of flat metal or plastic sheets interlocked at their ends to form an endless belt. When of the latter type the belt will be carried on square pulleys at each end thereof but should it be desired the end pulleys may be hexagonal or octagonal in form to overcome the elevation of the belt when the pulley is being rotated.

This invention is an improvement over my former Patent No. 2,256,504, dated Sept. 23, 1941J and is a development necessary for handling certain types of heavies other than those designated as gold in the former application.

These and many other objects I accomplish with the device illustrated in the accompanying drawings in which similar numerals and letters of reference indicate like parts throughout the several views and as described in the specification forming a part of this application and pointed out in the appended claim.

In the drawings in Figure 1 I have shown a side elevation of the machine.

Figure 2 shows a plan viewr of the machine parts cut away for clarity.

Figure 3 is a section longitudinally of the endless belt and its associated platform.

Figure 4 is a longitudinal section of the type of device in which the endless -belt is made of individual sections interlocking as a link belt,

Figure 5 is a plan view of the endless belt and framework therefor.

Figure 6 is an enlarged sectional View of one section of the link type belt showing the use of my wash collecting pans therein.

Figure 7 is a diagrammatic longitudinal section showing the use of square pulleys for driving the endless link type of belt.

Figure 8 is a plan View of Figure 7.

Figure 9 is an enlarged section of one of the links and the beginning of another.

Figure 10 is an end view oi a hexagonal pulley used when the square pulley will not meet the requirements.

In the drawings I have mounted in a framework uprights 6 and I. Suspended from chains or cables `8` I provide a main rotatable body B. This body consists of stringers and cross pieces to make aY frame on and in which the endless belt C of the invention is operated. The endless belt C is mounted on two spaced apart rollers I I) and I I. The roller or drum Il) is the driving drum and the drum` II is the driven or idler drum and is provided witht'ension screws I2 to take up vthe slack in the belt. g

The two drums operate on shafts I3 and I4 be! tween sidewall pieces I5 and I6 and a sheave wheel I'I is mounted on the end of the shaft I3 which extends beyond the side piece I5. This sheave is driven by a belt I8 from a drive sheave I9 driven by a reduction gear assembly mounted in the casing 20. A motor M drives the reduction gears through a belt 2|, sheave 22 on the motor and sheave 23 driving the shaft 24 of the reduction gears. A tailings flume 25 is mounted below the discharge end of the endless belt to catch the tailings from the machine.

shown the invention as A consisting of a base 5,

over the endless belt and the jet 30 of water is sprayed onto the y of the belt where eleavted end it passes around the pulley fall into the launder 2li. Most on the belt is introduced with the material being treated when it enters the feeder trough 21. More than one feeder trough may be provided or the feed may be from an elevated feed trough with lports downwardly extended to carry the feed entirely across the machine.

The circular motion is transmitted Ato the -endless belt C and its supporting framework 'B by providing two spaced cams 32 and 33 mounted on the top end of vertical shafts 34' and 35, and driven from a common drive shaft `315 4by sets of beveled gears 38 and 39. Each cam is provided with a connecting rod or link 40 extending up and operating in a socket 4| on the underside rof the framework B.

The shaft 36 is driven by a sheave 42, a belt 43 and sheave 44 operated by a motor 45. Thus when the motor is operating the shaft 36 is rotating, in turn rotating the bevel gears v38 and 39 which transmits motion to the vertical shafts 34 `and -35 rotating `the cams ,32 and 33, transmitting the .rotary motion to the -entire framework B and belt -C. The position of the .rods 40 of the cams may be varied in relation to the axis of the cams thereby changing the size of the circular motion transmitted to `the belt C to adapt the machine for various uses with different materials.

In Figures 4, 5, vand 6 I have shown a modification of the invention in which a framework Bl is :supported from a support frame Al, and an endless belt -CI is made of a multiplicity of flat links 41 each being formed with one edge as an engaging joint l4B Aand the other edge formed 'as in `interengaging joint 49. These joints .may rbe made either as shown in Figure 9 or as in Figure 6. They constitute elongated tubular portions h-aving one .open slot with the edgeof the next link formed with an engaging tubular portion with the slot reversed, and on the upper side of the link. In some cases the links will be formed withconcentrate pans 50 .formed therein to catch the `values on the belt, The belts are driven by square .pulleys l at each end thereof or as shown in Figure '10 the pulleys may be .made .hexagonal in -form to eliminate the spread of -the belt when passing over the cor-ners of the square `pulleys 4as they rotate. One of the pulleys -is driven by sheave Wheel 53 which is driven -by a belt `54 eX- tending down from a. motor 155 mounted in the top of the framework Al. With this Atype of drive the motor does not have to be carried on the support framework BI..

Each side ofthe framework Bl is provided with sidewalls in which the shafts ofthe square pulleys are mounted in suitable bearings and suitable guide rollers maybe provided to support the belt orside strips on which the Vbelt rests maybe provided as in Figures l1 to 3 inclusive illustrate.

The rotary motion is transmitted yto the frame- Work BI in the same manner-as that of the other figures. Feed .troughs yand tailings troughs will also `be provided and the belt will be sprayed by the 'same type of sprays as shown .in Figures 1 and y2 wit-h the addition that Aanother clean up spray 51 may be mounted along the end of the framework where the valuesare concentrated to wash the values rfrom the links -of the belt.

Figures 7 to 9 illustrate the forming of the endless belt C2 as made of metal or plastic links 69 without any depressions therein. The belt may be driven in either direction with this type of belt depending upon the use to which it is being placed and in some cases the hinge connection 6I may act as a riflle when traveling in a direction that the hinge will be catching the fines therebefore. vSid'ewalls 62 may be used :in the links where and when necessary as shown in Figures 19 and l0.

Having thus described my invention I desire to secure by Letters Patent and claim:

An ore separation device comprising a framework; a drive motor mounted on the base of the framework; a horizontal shaft driven from the motor; spaced vertical shafts driven from the `horizontal shaft; an eccentric mounted on the top end o'f each vertical shaft; a rotatable body suspended at each corner by flexible means depending from the top of the framework; cam rods yextending up from the eccentric cams to engage the bottom of the rotatable .body to .transmit yrotary motion to the rotatable body; a fdriving drum mounted transversely of said .rotatable body; .a-driven drum mounted `at `the other -end of said vbody at a level slightly lower .than the first drum; `a flexible belt carried on said drums; guide means extending inwardly from the Asides of the rotatable body said guide imeans -.to -gu-ide the main portion Iof the upper stretch of .endless belt between the drums -on .a substantially .horizontal plane and lpermit the-end .near the Adriving drum to incline upwardly adjacent thereto for la short distance; a drive `motor mounted .at .one end of the rotatable body; `a gear reductiondevice driven by .said motor; means to drive 4the upper drum from the .gear :reduction device; a discharge launder mounted at ,the upper end of .the `endless belt and extending through the rotatable body and rotatable therewith .to insure positive .collec tion of all values from the endless belt.; .a feed .trough mounted .to feed ore onto the -endless vbelt adjacent the inclined larea thereof; .a water pipe mounted above the endless belt; spaced sprays extending ldown to spray the material .as it .is carried up the belt .and along its upper carrying surface; and a cleaner spray extending down 'from the Yend of said pipe to .dislodge the -values from the drum end of the belt into the discharge launder to clean the belt of all values.

FRANK P.. S'IEWART.

REFERENCES CITED The following references are of record -in =.the file of this patent:

UNITED STATES PATENTS Great .Britain May 15, .1930 

